[myovchev]

Summary

Add host validation error handling and tests for Vite middleware

What are the specific steps to test this change?

Requests with not allowed hosts prints console warning.

What kind of change does this PR introduce?

(Check at least one)

• Bug fix
• New feature
• Refactor
• Documentation
• Build-related changes
• Other

Make sure the PR fulfills these requirements:

• It includes a) the existing issue ID being resolved, b) a convincing reason for adding this feature, or c) a clear description of the bug it resolves
• The changelog is updated
• Related documentation has been updated
• Related tests have been updated

If adding a new feature without an already open issue, it's best to open a feature request issue first and wait for approval before working on it.

Other information:

[linear]

PRO-8133 Spike: improve error message when running apostrophe locally with vite on a non-localhost domain, which generates a confusing 403 right now

[haroun]

⚠️  Vite dev server blocked a request from hostname: en-gb-site.test:3000
   This hostname is not in the allowed hosts list.
   To fix this, add the hostname to your Vite configuration:

   // apos.vite.config.js
   import { defineConfig } from '@apostrophecms/vite/vite';

   export default defineConfig({
     server: {
       allowedHosts: ['en-gb-site.test', 'localhost']
     }
   });

cc: @BoDonkey for documentation